期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 8, 期 1, 页码 231-241出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta10560c
关键词
-
资金
- National Natural Science Foundation of China [51772164]
The shuttling of soluble lithium polysulfides (LiPSs) in Li-S batteries during the cycling process is considered as a serious problem to handle. It often brings about sluggish redox kinetics, rapid capacity decay and limited sulfur utilization. In this study, we fabricate a novel functional interlayer by wrapping dispersed zinc sulfide (ZnS) nanospheres with a graphene-like ultrathin wrinkled carbon film (ZnS@WCF) through a facile hard-template method. The WCF acts as a unique 3D conductive network and ZnS nanospheres provide strong chemisorption of LiPSs. Owing to the synergistic effects between polar ZnS and the conductive WCF, the as-prepared interlayer can not only serve as a physical barrier but can also recycle the dissolved LiPSs with fast reaction kinetics. Li-S batteries based on such a ZnS@WCF modified separator exhibit remarkable capacity retention and outstanding rate performance. When cycling at 1C, a considerable specific capacity of 685 mA h g(-1) can still be maintained after 600 cycles with an extremely low fading decay of 0.045% per cycle. This novel interlayer holds great potential in realizing the wide practical application of Li-S batteries.
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